Apparatus for dispensing powderous matter



v March 25,1924. v 1,488,074

I O. SOINE ET AL APPARATUS FOR DISPENSINGTPOWDEROUS MATTER Filed Dec. 121923 I Fig.4

b Dis Pdenfan'wilk Mid! u. Dn-Ing- Beck Patented Mar. 25, 1924.

orro sornn AND CARL rErEnsEn, or nnonswrox, GERMANY, .essrenons 'roAIMME, GIESEGKE & KoNEenn, AKrrEnoEsE LsoHAr'r, BRAUNSCHWEIG, GERMANY,or BRUNSWICK, GERMANY, A CORPORATION or GEE-MANY.

APPARATUS FOR DISPENSING POWDER-GUS MATTER.

I Application filed December 12, 1923. Serial No. 680,285.

T 0 all whom it may concern Be it known that we, O'rro SOINE and CARLPETERsEN, citizens of Germany, residing at Brunswick, Germany, haveinvented certain new and useful Improvements in Apparatus for DispensingPowderous Matter (for which we have filed application in Germany,January 22, 1923), of which the following is a specification.-

Our invention relates to improvements in apparatus for dispensingpowderous matter, and more particularly in apparatus of the class inwhich a receptacle containing powderous matter such as chemicals orflour is provided at its bottom with suitable means such as a wormconveyer for dispensing small amounts of the said matter. The object ofthe improvements is to provide an apparatus in which the amountdispensed by the said means is independent of the gravity of the massstored in the receptaole, so that by each operation a uniform mass isdispensed. With this object in view our invention consists in separatingthe bottom part of the receptacle from the body thereof by a member suchas a partition wall supporting the mass of the powderous matter,providing means permitting the passage of matter to the bottom part, andmeans for returning the excess of matter from the bottom part to thebody of the receptacle, so that the mass confined within the bottom partis always under the same pressure.

For the purpose of explaining the invention an example embodying thesame has been illustrated in the accompanying drawing in which,

Fig. 1, is a sectional elevation of the apparatus, and

Fig. 2, is a plan view thereof.

In the example shown in the drawing a receptacle a is divided by ahorizontal partition wall it into an upper or main chamber m and abottom chamber a, the upper or main chamber containing the mass ofpowderous matter and the bottom chamber a portion of the powderousmatter. The partition h is provided with one or more holes 2' permittingthe passage of the powderous matter from the chamber m to the chamberat, a rotary arm 70 being provided for gradually moving the matter overthe bottom to the hole 71 and stirring the matter sticking together overthe hole in the manner of a vault. From the bottom chamber a thematerial to be dispensed is taken for example by means of a rotary arm fand a slowly rotating worm o. By the partition h the matter confinedwithin the chamber a is relieved of the pressure of the mass of mattercontained within the chamber m.

We have found that in apparatus of the construction so far described thematter discharged from the bottom chamber n is not always uniformlycompensated by an equal mass filled into the same, and that therefore,by reason of the varying pressure of the matter, the discharge by meansof the conveyer c is not always uniform. Therefore, we supply morepowderous matter into the bottom chamber than is taken therefrom bymeans of the conveyor 0 and we provide means for returning the excess ofmatter into the main chamber, said returning means being constructed sothat it is operative only as long as the matter within the chamber nrises above a certain level. In the example shown in the figures Weprovide a helical oonveyer Z extending from the bottom chamber to themain chamber. The said conveyor has no casing but it is open at theportion extending through the top part of the bottom chamber and asshown down to the bottom. In the preferred form shown in the figure thelower part of the conveyer is in the form of a cone and the upper partis cylindrical. By

means of the conveyor Z a part of the powderous matter is carriedupwardly and returned into the chamber m, so that choking of the chamber72 and an excessive pressure are avoided. If the powderous matter doesnot fill out the chamber a the matter falls from the upper part of theconveyor where it is not enclosed by the surrounding mass of powderousmatter so that no matter is returned into the chamber m until thechamber n is again filled.

We claim:

1. An apparatus for storing and dispensing powderous matter, comprisinga recep tacle, means within said receptacle located away from the bottomthereof for supporting the powderous matter and permitting the passageof powderous matter to the bottom part of the receptacle, means toreturn a part of the matter from the bottom part of the receptacle tothe part above the supporting means, and means for dispensing matterfrom the bottom part of the receptacle.

2. An apparatus for storing and dispensing powderous matter, comprisinga receptacle, means Within said receptacle located away from the bottomthereof for supporting the powderous matter and permitting the passageof powderous matter to the bottom part of the receptacle, a screwconveyer mounted for returning a part of the matter from the bottom partof the receptacle to the part above the supporting means and laterallyopen at the part below said supporting means, and means for dispensingmatter from the bottom part of the receptacle.

In testimony whereof We have affixed our signatures.

OTTO SOINE. CARL PETERSEN.

